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Efficient frequency conversion of femtosecond optical pulses by four-wave mixing through filamentation is investigated in terms of experiment and theory. The generated two-color deep-UV pulses were possible to use for time-resolved photoelectron imaging spectroscopy.
Internal conversion (IC) in polyatomic molecules is one of the most essential processes for understanding energy transfer in photochemical reactions. The IC through conical intersection is usually very fast process, <100 fs time scale. Time-resolved photoelectron spectroscopy (TRPES) is one of the best methods to investigate such photochemical reaction dynamics for isolated molecules. However,...
Summary form only given. We have demonstrated DUV pulses generated by non-degenerate four-wave mixing through filamentation in neon gas. The pulse energy easily reaches ten micro joule order or more. The generated spectra, centered at 267 nm and 200 nm, are broad enough to be 10-fs pulses. The 267 nm pulses were compressed down to 13 fs by a single-pass grating compressor and characterized by TG-FROG...
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